Postgresql on file system EXT2 or EXT3

Hello:

I would like to know whether there is any different in installing Postgresql 
on the Linux system with file system of EXT2 or EXT3. I have two machines 
with idential OS (Red Hat 7.3 install with postgresql 7.3.4) but with 
different file system, 1 is EXT2 and the other is EXT3. When I insert 10,000 
records to the two machines, I found that the machine with EXT2 insert much 
quicker than the other with EXT3.

Is postgresqk perform better with EXT2 file system?

Thanks a lot!
Carmen

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